CN105578539A - Optimal switching method supporting multiple PDN connections and corresponding network node - Google Patents
Optimal switching method supporting multiple PDN connections and corresponding network node Download PDFInfo
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Abstract
The invention relates to an optimal switching method supporting multiple PDN connections and a corresponding network node. The method includes the following steps that: as for each PDB connection which is built by user equipment (UE) by using the same access point name (APN), an HSGW sends a request message to a PDN gateway to request corresponding generic routing encapsulation key (GRE KEY) information for the corresponding PDB connection; after receiving the request message, the PDN gateway makes the corresponding GRE KEY information carried in a response message returned to the HSGW; and after receiving the response message, the HSGW saves the GRE KEY information corresponding to the PDB connection. According to the method of the invention, when the UE is optimally switched to an eHRPD and builds a plurality of PDN connections by using one APN, rapid recovery of data services can be realized.
Description
Technical field
The present invention relates to the communications field, the optimization switching handling method supporting many PDN to connect in particular to a kind of and corresponding network node.
Background technology
Forth generation mobile communications network, namely long evolving system (LongTimeEvolution, referred to as LTE) also starts widespread deployment.LTE network and evolved high speed grouped data (evolvedHighRatePacketData, referred to as eHRPD) coexisting of network must continue the quite a long time, this require both can interoperability, Fig. 1 is LTE and the eHRPD mutual operation network Organization Chart of correlation technique, as shown in Figure 1, subscriber equipment (UserEquipment, referred to as UE) can switch fast under 2 kinds of networks.In LTE network and eHRPD network, in order to ensure the service quality (QualityofService, referred to as QoS) of data service, the dedicated bearing that the data business establishment that can require for different QoS is corresponding.When switching between LTE network and eHRPD network, the dedicated bearing set up in source network, needs recovery in object network.
For accelerating the handoff procedure from LTE to eHRPD, 3GPP and 3GPP2 related protocol defines the optimization handoff functionality of LTE to eHRPD.According to the description of 3GPP2X.S0057-Bv1.012 chapter, the optimization switching of LTE to eHRPD comprises pre-registration procedure and actual handover process.The time of service disconnection during mobile terminal moves eHRPD from LTE is shortened by increasing pre-registration.Optimize switching and require mobile management entity (MobilityManagementEntity, referred to as MME) and the Packet Control Function (evolvedAccessNetwork/evolvedPacketControlFunction of access network/evolution of evolution, referred to as eAN/ePCF) there is S101 tunnel between 111, gateway (ServingGateway, referred to as SGW) there is S103 tunnel between 104 and HRPD gateway (HRPDServingGateway, referred to as HSGW) 110.
Pre-registration procedure.When UE106 is also under LTE time, based on the triggering of radio layer, the process of pre-registration can be initiated by S101 tunnel.In the process of pre-registration, the upper A10 that can set up of HSGW110 connects, and sets up PPP session, completes the process of authentication; The Packet Data Network (PacketDataNetwork, referred to as PDN) set up under LTE network connects, and is also created under eHRPD.
Actual handover process.Under UE106 has arrived eHRPD covering, HSGW110 and PDN Gateway (PDNGateway) 105 set up PMIPv6 (ProxyMobileIPv6, proxy-mobile IP version 6) session, up-downgoing data path is modified as and transmits between HSGW110 and PDN Gateway 105.The resource of UE106 under LTE network is released.
Fig. 2 is the flow chart of the optimization switching pre-registration of correlation technique, and as shown in Figure 2, this flow process comprises the steps:
Step 201, UE106 accesses successfully under LTE network, wireless signal under eHRPD detected, carries out pre-registration by S101 tunnel to eHRPD;
Step 202, eAN/ePCF111 sends A11RRQ (registration request) to HSGW110, carries tunnel mode field, and value be 1 (value be 1 expression UE106 under LTE network, send signaling to eHRPD network by S101 tunnel);
Step 203, HSGW110 receives A11RRQ, is 1 according to the value of tunnel mode field, can know that pre-registration starts, and returns A11RRP (registration reply) to eAN/ePCF111;
Step 204, UE106, HSGW110 complete LCP (LCP) and consult, UE, HSGW110 and 3GPP2AAAProxy (3GPP2 authentication and authorization charging proxy server) 108 completes authentication process, and HSGW110 preserves the information of LCP and authentication.3GPP2AAAProxy108 will with 3GPPAAAServer (3GPP authentication authorized charging server) 107, home subscribed services device (HomeSubscriberServer, referred to as HSS) 101 completes the Authentication Authorization function to UE106 together;
Step 205, UE106 and HSGW110 initiating equipment decides through consultation that the Network Control Protocol (VendorSpecificNetworkControlProtocol, referred to as VSNCP) of justice is consulted.UE106 carries identification information and the APN of UE in VSNCP configuring request, and the address of UE, if there is IPv6 to serve, carries IPv6 interface ID; If there is IPv4 service to carry IPv4 address; If establish multiple PDN with an APN to connect, carry PDN connection identifier (the field name user's context mark in VSNCP agreement: UserContextIdentifier).
Step 206, HSGW110 initiates the request of setting up gateway control session to strategy and charging regulation function entity (PolicyandChargingRulesFunction, referred to as PCRF) 102;
Step 207, PCRF102 returns the response message of the request of setting up gateway control session;
Step 208, HSGW110 sends out VSNCP to UE106 and configures response message;
Step 209, HSGW110 sends out VSNCP configuration request message to UE106;
Step 210, UE106 sends out VSNCP to HSGW110 and configures response message, completes the process that the VSNCP between UE106 and HSGW110 consults; The value receiving tunnel mode field in A11RRQ due to HSGW110 is 1, so HSGW110 gets along well, PDN Gateway 105 carries out PBU/PBA Signalling exchange to set up PMIPv6 session.
Step 211, PCRF102 initiates the process that network side sets up dedicated bearing, to recover the dedicated bearing that UE106 has set up under LTE.For this reason, PCRF102 initiation gateway control and Qos rule issue request message;
Step 212, HSGW110 returns gateway control to PCRF102 and Qos rule issues response message;
Step 213, HSGW110 receives the message of PCRF102, sends out RSVP (ResourceReservationProtocol, referred to as RSVP) Resv message to UE106, and TFT command code is set up for stream and asked.
Step 214, UE106 sends out RSVPResv message, and TFT is installed in request;
Step 215, HSGW110 sends out RSVPResvconf message to UE106, completes negotiation;
Step 216, is triggered by step 213, and as required, eAN/ePCF111 and HSGW110 sets up stream and the new auxiliary connection of A10 by A11 message; So far, the context of the UE106 that HSGW110 has set up, dedicated bearing is also set up;
Step 218, after completing pre-registration, under UE106 might not be switched to eHRPD very soon.When the increase that UE106 has PDN to connect under LTE, amendment, when deletion, UE106 can carry out VSNCP by tunnel and HSGW110 and consult more new session.Equally, PCRF102 also can initiate the increase of dedicated bearing, deletes, and upgrades, with ensure with LTE under synchronous.
Fig. 3 optimizes the flow chart switching (i.e. actual switching) under the state of activation of correlation technique, as shown in Figure 3, this flow process comprises the steps:
Step 301, after UE106 completes pre-registration, under preparing to be switched to eHRPD;
Step 302, UE106 sends out HRPD (HRPD (high rate packet data)) connection request message and sets up transmission channel to E-UTRAN (the Universal Terrestrial wireless access network of evolution) request.This request is forwarded to MME;
Step 303, GREKEY information corresponding for APN is sent to eAN/ePCF111 by HRPD connection request message by MME.
Step 304, eAN/ePCF111 sends out A11RRQ to HSGW110, carries tunnel mode field, and value is 1, and carries PDN Gateway 105 address, APN (AccessPointName), GREKEY (generic route encapsulation key) information;
Step 305, HSGW110 receives A11RRQ, and response A11RRP message, carries the address of HSGW110, the GREKEY information in APN, S103 tunnel;
Step 306, eAN/ePCF111 sends HRPD traffic channel assignment message to MME, carries the address of HSGW110, the GREKEY information in APN, S103 tunnel;
Step 307, MME forwarding service channel assignment message is to E-UTRAN.This message slips in S101 tunnel message.This message can be forwarded to UE106.After completing said process, after downlink data arrives SGW from PDN Gateway 105, SGW is transmitted to HSGW110 by S103 tunnel, and HSGW110 is being sent to eAN/ePCF111 network element;
Step 308, UE106 be switched to eHRPD network wireless under; In this time, if UE106 sends upstream data, the upstream data of UE106 just can be sent to PDN Gateway 105 according to the information obtained from A11RRQ in step 305 by HSGW110.
Step 309, eAN/ePCF111 sends out A11RRQ to HSGW110, carries tunnel mode field, value is 0, show UE106 eHRPD wireless descend;
Step 310, HSGW110 returns A11RRP message to eAN/ePCF111;
Step 311, is triggered by step 309, and HSGW110 is to PDN Gateway 105 PBU message;
Step 312, PDN Gateway 105 returns response message PBA, carries the information such as GREKEY;
Step 313, start to set up under LTE if UE106 has, the PDN also do not set up connects, and UE106 initiates under eHRPD, set up this PDN and connects.So far, optimize handoff procedure to complete.
By above-mentioned pre-registration, and optimize in handoff procedure under state of activation and can find out, HSGW110 just can forwarding uplink data after step 308, does not need by the time after step 312.This is because in step 305, HSGW110 obtains PDN and connects corresponding GREKEY, when receiving upstream data, finding the PDN of this user to connect, this GREKEY just can be used to send to PDN Gateway according to APN.Unfortunately, in time establishing multiple PDN under there is same APN and connect, owing to cannot determine it is the GREKEY which PDN connects according to APN information, cause forwarding.Until step 312, after HSGW110 receives PBA, just can obtain the GREKEY that each PDN connects, just can normal forwarding uplink data.
Therefore, in the related, there is UE and optimize to eHRPD in the process switched, in time establishing multiple PDN under there is same APN and connect, the defect that upstream data break period is longer.
Summary of the invention
In view of this, the invention provides a kind of method that optimization supporting multi-packet data network PDN to connect switches, be applied to evolved high speed packet data gateway HSGW, described method comprises:
In the pre-registration procedure that long evolving system LTE network switches to the optimization of evolved high speed grouped data eHRPD network, HSGW connects user equipment (UE) each PDN that same APN APN sets up, sending a request message to PDN Gateway, is the generic route encapsulation key GREKEY information that this PDN connection request is corresponding;
Described HSGW receives the response message that described PDN Gateway returns for described request message, preserves the PDN carried in described response message and connects corresponding GREKEY information.
Preferably,
Described request message is agent binding update PBU message, described PBU message carries the identification information that this PDN of pre-registration indication information and unique identification is connected, and it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message.
Preferably,
Described pre-registration indication information is a self-defined mobile option of manufacturer of definition separately in PBU message; Or, be the value that the switching indication field existed in PBU message newly increases.
Preferably,
Described HSGW sends a request message to described PDN Gateway, is the GREKEY information that this PDN connection request is corresponding, comprises:
Described HSGW and described UE be this PDN be connected carry out equipment vendor definition Network Control Protocol VSNCP negotiations process in, described HSGW receives the VSNCP configuring request that described UE sends, carry the identification information that this PDN of unique identification connects in described VSNCP configuring request, the identification information that this PDN of described unique identification connects comprises: the identification information that the identification information of described UE, described APN are connected with this PDN;
Described HSGW sends PBU message to described PDN Gateway, carries the identification information that pre-registration indication information is connected with this PDN of described unique identification.
Preferably,
In the described method actual handover process that after being also included in described pre-registration procedure, described UE initiates, if described HSGW receives the upstream data of the PDN connection that described UE sends, then connect corresponding GREKEY information according to the described PDN preserved, described upstream data to be encapsulated in gre tunneling and to be sent to corresponding PDN Gateway.
In view of this, present invention also offers a kind of method that optimization supporting multi-packet data network PDN to connect switches, be applied to packet data network PDN Gateway, described method comprises:
In the pre-registration procedure that long evolving system LTE network switches to the optimization of evolved high speed grouped data eHRPD network, PDN Gateway receives the request message that evolved high speed packet data gateway HSGW sends, and described request message is for being generic route encapsulation key GREKEY information corresponding to a PDN connection request;
Described PDN Gateway returns response message to described HSGW, carries this PDN and connect corresponding GREKEY information in described response message.
Preferably,
Described request message is agent binding update PBU message, described PBU message carries the identification information that this PDN of pre-registration indication information and unique identification is connected, and it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message;
Described response message is that agent binding confirms PBA message, and the identification information carrying this PDN of unique identification connection in described PBA message is connected corresponding GREKEY information with this PDN.
In view of this, present invention also offers a kind of method that optimization supporting multi-packet data network PDN to connect switches, be applied to the pre-registration procedure that long evolving system LTE network switches to the optimization of evolved high speed grouped data eHRPD network, described method comprises:
User equipment (UE) each PDN that same APN APN sets up is connected, performs following process:
Evolved high speed packet data gateway HSGW sends a request message to PDN Gateway, is the generic route encapsulation key GREKEY information that this PDN connection request is corresponding;
After described PDN Gateway receives described request message, in the response message returning to described HSGW, carry this PDN connect corresponding GREKEY information;
After described HSGW receives described response message, preserve this PDN and connect corresponding GREKEY information.
Preferably,
Described request message is agent binding update PBU message, described PBU message carries the identification information that this PDN of pre-registration indication information and unique identification is connected, and it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message;
Described response message is that agent binding confirms PBA message, carries the identification information of this PDN of unique identification connection and described GREKEY information in described PBA message.
Preferably,
Described pre-registration indication information is a self-defined mobile option of manufacturer of definition separately in PBU message; Or
Described pre-registration indication information is the value that the switching indication field existed in PBU message newly increases.
Preferably,
Described HSGW sends a request message to described PDN Gateway, is the GREKEY information that this PDN connection request is corresponding, comprises:
Described HSGW and described UE be this PDN be connected carry out equipment vendor definition Network Control Protocol VSNCP negotiations process in, described HSGW receives the VSNCP configuring request that described UE sends, the identification information that this PDN of unique identification connects is carried, comprising the identification information that the identification information of described UE, the information of described APN are connected with this PDN in described VSNCP configuring request;
Described HSGW sends PBU message to described PDN Gateway, carries the identification information that this PDN of pre-registration indication information and unique identification is connected.
Preferably,
Described method also comprises: in the actual handover process that described UE initiates after described pre-registration procedure, if described HSGW receives the upstream data of the PDN connection that described UE sends, described HSGW connects corresponding GREKEY information according to the described PDN preserved, and to be encapsulated into by described upstream data in gre tunneling and to be sent to corresponding PDN Gateway.
In view of this, invention further provides a kind of evolved high speed packet data gateway HSGW, comprise the pre-registration processing module that long evolving system LTE network switches to the optimization of evolved high speed grouped data eHRPD network, described pre-registration processing module comprises:
Information request unit, for connecting user equipment (UE) each PDN that same APN APN sets up, sends a request message to grouped data network gateway PDN Gateway, is the generic route encapsulation key GREKEY information that this PDN connection request is corresponding;
Information memory cell, for receiving the response message that described PDN Gateway returns for described request message, preserving the PDN carried in described response message and connecting corresponding GREKEY information.
Preferably,
Described information request unit is agent binding update PBU message to the request message that PDN Gateway sends, the identification information that this PDN of pre-registration indication information and unique identification is connected is carried in described PBU message, it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message, described pre-registration indication information is a self-defined mobile option of manufacturer of definition separately in PBU message, or the value that the switching indication field existed in PBU message newly increases.
Preferably,
Described HSGW also comprises: the actual hand-off process module that LTE network switches to the optimization of eHRPD network, and described actual hand-off process module comprises:
Upstream data retransmission unit, for in the actual handover process that UE described after pre-registration procedure initiates, if receive the upstream data of the PDN connection that described UE sends, then connect corresponding GREKEY information according to the described PDN preserved, described upstream data to be encapsulated in gre tunneling and to be sent to corresponding PDN Gateway.
In view of this, the present invention has reoffered a kind of packet data network PDN Gateway, and comprise the pre-registration processing module that long evolving system LTE network switches to the optimization of evolved high speed grouped data eHRPD network, described pre-registration processing module comprises:
Message reception units, for receiving the request message that evolved high speed packet data gateway HSGW sends, described request message is for being generic route encapsulation key GREKEY information corresponding to a PDN connection request;
Message response unit, after receiving described request message, returns response message to described HSGW, carries this PDN and connect corresponding GREKEY information in described response message.
Preferably,
The described request message that described message reception units receives is for being agent binding update PBU message, described PBU message carries the identification information that this PDN of pre-registration indication information and unique identification is connected, and it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message;
Described message response unit is that agent binding confirms PBA message to the response message that described HSGW returns, and the identification information carrying this PDN of unique identification connection in described PBA message is connected corresponding GREKEY information with this PDN.
Correspondingly, present invention also offers the system that a kind of optimization supporting multi-packet data network PDN to connect switches, comprise evolved high speed grouped data eHRPD network and long evolving system LTE network, wherein, the evolved high speed packet data gateway HSGW in described eHRPD network adopts above-mentioned HSGW provided by the invention; Packet data network PDN Gateway in described LTE network adopts above-mentioned PDN Gateway provided by the invention.
Such scheme can overcome under the UE that exists in prior art optimizes and be switched to eHRPD, when exist with an APN establish multiple PDN connect time, the defect that upstream data break period is longer, provide UE from LTE optimize be switched to eHRPD time data service fast quick-recovery.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is LTE and the eHRPD mutual operation network Organization Chart of correlation technique;
Fig. 2 is the signaling process figure of the optimization switching pre-registration of correlation technique;
Fig. 3 is the signaling process figure optimizing switching under the state of activation of correlation technique;
Fig. 4 is the flow chart of the optimization switching pre-registration that embodiment of the present invention HSGW performs;
Fig. 5 is the flow chart of the optimization switching pre-registration that embodiment of the present invention PDN Gateway performs;
Fig. 6 is the flow chart of the optimization switching pre-registration that the embodiment of the present invention supports many PDN to connect;
Fig. 7 is the signaling process figure of the optimization switching pre-registration that the embodiment of the present invention supports many PDN to connect;
Fig. 8 is the structure chart of the pre-registration instruction mobile option of the embodiment of the present invention;
Fig. 9 is the module map of the HSGW of the embodiment of the present invention; And
Figure 10 is the module map of the PDN Gateway of the embodiment of the present invention.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.
The present embodiment optimizes on handoff functionality basis at 3GPP2 and 3GPP protocol definition, by what realize the improvement optimizing handoff procedure.According to the analysis of correlation technique above, the reason of the defect causing upstream data break period longer under same APN, establishes multiple PDN when connecting, HSGW110 cannot obtain GREKEY corresponding in PDN connection, and (GREKEY in literary composition all refers to that HSGW uses GREKEY when PDN Gateway sends data, in different standards, also referred to as PDN Gateway GREKEY or up GREKEY).It is that PDN Gateway 105 distributes that PDN connects corresponding GREKEY, and a kind of method addressed this problem is exactly that HSGW110 asks GREKEY information to PDN Gateway 105.
As shown in Figure 4, the method that the optimization that the many PDN of support that the present embodiment HSGW performs connect switches comprises:
Step 110, in the pre-registration procedure that LTE network switches to the optimization of eHRPD network, HSGW connects UE each PDN that same APN APN sets up, and sends a request message to PDN Gateway, is the generic route encapsulation key GREKEY information that this PDN connection request is corresponding;
Preferably, above-mentioned request message is agent binding update (PBU, ProxyBindingUpdate) message, described PBU message carries the identification information that this PDN of pre-registration indication information and unique identification is connected, and it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message.Described pre-registration indication information can be a self-defined mobile option of manufacturer of definition separately in PBU message, or, be the value that the switching indication field existed in PBU message newly increases.
In the present embodiment, preferably, HSGW sends a request message to described PDN Gateway, is the GREKEY information that this PDN connection request is corresponding, comprises:
Described HSGW and described UE be this PDN be connected carry out equipment vendor definition Network Control Protocol VSNCP negotiations process in, described HSGW receives the VSNCP configuring request that described UE sends, the identification information that this PDN of unique identification connects is carried, comprising the identification information that the identification information of described UE, described APN are connected with this PDN in described VSNCP configuring request;
Described HSGW sends PBU message to described PDN Gateway, carries the identification information that this PDN of pre-registration indication information and unique identification is connected.
Step 120, HSGW receives the response message that PDN Gateway returns for described request message, preserves the PDN carried in described response message and connects corresponding GREKEY information.
In the present embodiment, preferably, above-mentioned response message is that agent binding confirms (PBA, ProxyBindingAcknowledgement) message, carries the identification information of this PDN of unique identification connection and described GREKEY information in described PBA message.
In the actual handover process that described UE initiates after described pre-registration procedure, if described HSGW receives the upstream data of the PDN connection that described UE sends, described HSGW connects corresponding GREKEY information according to the described PDN preserved, described upstream data to be encapsulated in gre tunneling and to be sent to corresponding PDN Gateway, thus completing the timely forwarding of upstream data.
As shown in Figure 5, the method that the optimization that the many PDN of support that the present embodiment PDN Gateway performs connect switches comprises:
Step 210, in the pre-registration procedure that LTE network switches to the optimization of eHRPD network, PDN Gateway receives the request message that HSGW sends, and described request message is for being generic route encapsulation key GREKEY information corresponding to a PDN connection request;
Preferably, described request message is agent binding update PBU message, described PBU message carries the identification information that this PDN of pre-registration indication information and unique identification is connected, and it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message.
Step 220, PDN Gateway returns response message to described HSGW, carries this PDN and connect corresponding GREKEY information in described response message.
Preferably, described response message is that agent binding confirms PBA message, and the identification information carrying this PDN of unique identification connection in described PBA message is connected corresponding GREKEY information with this PDN.
Correspondingly, the optimization that the embodiment of the present invention supports many PDN to connect switches the flow process of pre-registration as shown in Figure 6, in the pre-registration procedure that LTE network switches to the optimization of eHRPD network, user equipment (UE) each PDN that same APN APN sets up is connected, performs following process:
Step 310, HSGW sends a request message to PDN Gateway, is the generic route encapsulation key GREKEY information that this PDN connection request is corresponding;
Preferably, described request message is agent binding update PBU message, described PBU message carries the identification information that this PDN of pre-registration indication information and unique identification is connected, and it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message.Correspondingly, described response message is that agent binding confirms PBA message, carries the identification information of this PDN of unique identification connection and described GREKEY information in described PBA message.Wherein, described pre-registration indication information is a self-defined mobile option of manufacturer of definition separately in PBU message; Or described pre-registration indication information is the value that the switching indication field existed in PBU message newly increases.
This step can comprise: described HSGW and described UE be this PDN be connected carry out equipment vendor definition Network Control Protocol VSNCP negotiations process in, described HSGW receives the VSNCP configuring request that described UE sends, the identification information that this PDN of unique identification connects is carried, comprising the identification information that the identification information of described UE, the information of described APN are connected with this PDN in described VSNCP configuring request; Then, described HSGW sends PBU message to described PDN Gateway, carries the identification information that this PDN of pre-registration indication information and unique identification is connected.
Step 320, after PDN Gateway receives described request message, carries this PDN and connects corresponding GREKEY information in the response message returning to described HSGW;
Step 330, after HSGW receives described response message, preserves this PDN and connects corresponding GREKEY information.
After this step, in the actual handover process that described UE initiates after described pre-registration procedure, if described HSGW receives the upstream data of the PDN connection that described UE sends, described HSGW connects corresponding GREKEY information according to the described PDN preserved, and to be encapsulated into by described upstream data in gre tunneling and to be sent to corresponding PDN Gateway.
According to the present embodiment optimization switch pre-registration concrete signaling process as shown in Figure 7, comprising:
Step 401, UE106 accesses successfully under LTE network, wireless signal under eHRPD detected, carries out pre-registration by S101 tunnel to eHRPD;
Step 402, eAN/ePCF111 sends A11RRQ (registration request) to HSGW110, carries tunnel mode field, and value be 1 (value be 1 expression UE106 under LTE network, send signaling to eHRPD network by S101 tunnel);
Step 403, HSGW110 receives A11RRQ, is 1 according to the value of tunnel mode field, can know that pre-registration starts, and returns A11RRP (registration reply) to eAN/ePCF111;
Step 404, UE106, HSGW110 complete LCP (LCP) and consult, UE, HSGW110 and 3GPP2AAAProxy (3GPP2 authentication and authorization charging proxy server) 108 completes authentication process, and HSGW110 preserves the information of LCP and authentication.3GPP2AAAProxy108 will with 3GPPAAAServer (3GPP authentication authorized charging server) 107, home subscribed services device (HomeSubscriberServer, referred to as HSS) 101 completes the Authentication Authorization function to UE106 together;
Step 405, UE106 and HSGW110 initiating equipment decides through consultation that the Network Control Protocol (VendorSpecificNetworkControlProtocol, referred to as VSNCP) of justice is consulted.UE106 carries identification information and the APN of UE in VSNCP configuring request, with the address of UE, if there is IPv6 to serve, carries IPv6 interface ID; If there is IPv4 service to carry IPv4 address; Connect if UE establishes multiple PDN with an APN, carry the identification field that PDN connects.
The identification information that the identification information of above-mentioned UE, APN with PDN are connected constitutes the identification information that unique identification one PDN connects.
Step 406, HSGW110 initiates the request of setting up gateway control session to strategy and charging regulation function entity (PolicyandChargingRulesFunction, referred to as PCRF) 102;
Step 407, PCRF102 returns the response message of the request of setting up gateway control session;
Step 408, HSGW110, to PDN Gateway 105 PBU message, carries the identification information that pre-registration indication information is connected with described unique identification one PDN;
It is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message.By carrying pre-registration indication information in PBU message, the PBU sent can be distinguished during pre-registration under the PBU sent and other scenes.And by carrying the information that unique identification one PDN connects in PBU message, making UE both use an APN to set up multiple PDN and connecting, also can connecting by this PDN of unique identification.
Step 409, PDN Gateway 105 receives PBU message, discovery carries pre-registration indication information, hand-off process is not carried out to this PMIPv6 session, return PBA message responsively, the identification information and this identification information institute uniquely identified PDN that carry described unique identification one PDN connection connect corresponding GREKEY information.
Above-mentioned PDN Gateway sends to the PDN of HSGW to connect corresponding GREKEY information when the upstream data that HSGW is connected by this PDN that gre tunneling sends UE by PBA message to be needed to use.After HSGW110 receives PBA message, preserve this PDN and connect corresponding GREKEY information as being saved in the context of this PDN connection.
Table 1 describes the mobile option of the PMIPv6 that PBA message is carried:
As shown above, the identification information of UE is write in " mobile node mark " field of PBA message, write APN in " service selection mobile option " field, in " PDN connection identifier " field, write the identification information that PDN connects, together constitute the identification information that described unique identification one PDN connects.And what write in " generic route encapsulation key " field is that this identification information institute uniquely identified PDN connects corresponding GREKEY information.PBA message can also carry other information.
Step 410, HSGW110 sends out VSNCP to UE106 and configures response message;
Step 411, HSGW110 sends out VSNCP configuration request message to UE106;
Step 412, UE106 sends out VSNCP to HSGW110 and configures response message, completes the process that the VSNCP between UE106 and HSGW110 consults; The value receiving tunnel mode field in A11RRQ due to HSGW110 is 1, so HSGW110 gets along well, PDN Gateway 105 carries out PBU/PBA Signalling exchange to set up PMIPv6 session.
Step 413, PCRF102 initiates the process that network side sets up dedicated bearing, to recover the dedicated bearing that UE106 has set up under LTE.For this reason, PCRF102 initiation gateway control and Qos rule issue request message;
Step 414, HSGW110 returns gateway control to PCRF102 and Qos rule issues response message;
Step 415, HSGW110 receives the message of PCRF102, sends out RSVP (ResourceReservationProtocol, referred to as RSVP) Resv message to UE106, and TFT command code is set up for stream and asked.
Step 416, UE106 sends out RSVPResv message, and TFT is installed in request;
Step 417, HSGW110 sends out RSVPResvconf message to UE106, completes negotiation;
Step 418, is triggered by step 415, and as required, eAN/ePCF111 and HSGW110 sets up stream and the new auxiliary connection of A10 by A11 message; So far, the context of the UE106 that HSGW110 has set up, dedicated bearing is also set up;
Step 405 is connect for a PDN VSNCP negotiations process and dedicated bearing process of establishing (optional) carried out to step 418.Connect if UE establishes multiple PDN with same APN, then each PDN is wherein connected, carry out the negotiations process of step 405 to step 418, in each negotiations process, HSGW obtains a PDN from PDN Gateway by the way and connects corresponding GREKEY information, finally gets all multiple PDN and connects corresponding GREKEY information.Connect if UE establishes multiple PDN with multiple APN, in the same way one or more PDN connections that each APN sets up are processed.
Step 419, after completing pre-registration, under UE106 might not be switched to eHRPD very soon.When the increase that UE106 has PDN to connect under LTE, amendment, when deletion, UE106 can carry out VSNCP by tunnel and HSGW110 and consult more new session.Equally, PCRF102 also can initiate the increase of dedicated bearing, deletes, and upgrades, with ensure with LTE under synchronous.
Step 408 in the process of above-mentioned pre-registration and step 409, HSGW110 can obtain PDN and connect corresponding GREKEY information.
Optimize the same prior art of process of switching under state of activation, see Fig. 2.After adopting the present invention, whether after step 308 and before step 318, no matter exist on same APN and have multiple PDN to connect, HSGW110 can both process the upstream data that UE106 sends, and after carrying out correct GRE encapsulation, sends to PDN Gateway 105.
The mobile option that PBU message in step 408 is carried can be as shown in table 2.
Table 2PBU carries mobile option
In table 2, pre-registration indication information is a self-defined mobile option of manufacturer of definition separately.Preferably, the self-defined mobile option of manufacturer of described independent definition can be defined as the mobile option of a particular vendor expansion, i.e. pre-registration instruction option, when optimization that and if only if switches pre-registration, in PBU, carry this field, concrete structure see Fig. 8, can comprise:
Type=19, represents the self-defining mobile option of manufacturer;
Length＝8
VendorID=3902, represents particular vendor
Subtype=1, is expressed as pre-registration instruction option.
Data, is set to 0 all the time, ignores this field during reception.
In table 2, the identification information of UE is write in " mobile node mark " field, write APN in " service selection mobile option " field, in " PDN connection identifier " field, write the identification information that PDN connects, together constitute the identification information that unique identification one PDN connects.
Preferably, the PBU message in step 408 can also be as shown in table 3.
Table 3PBU carries mobile option
As shown in table 3, " pre-registration instruction " multiplexing switching instruction option existed, and newly increase a value, represent that the scene sending PBU message is " optimize and switch pre-registration ".The value of the switching indication field of the current definition of RFC5213 is 0 to 5, optimizes to switch pre-registration and can be defined as 6 or any value except 0 to 5.
Correspondingly, present embodiments provide a kind of evolved high speed packet data gateway HSGW, comprise the pre-registration processing module that long evolving system LTE network switches to the optimization of evolved high speed grouped data eHRPD network, wherein, as shown in Figure 9, described pre-registration processing module comprises:
Information request unit 10, for connecting UE each PDN that same APN APN sets up, sends a request message to grouped data network gateway PDN Gateway, is the generic route encapsulation key GREKEY information that this PDN connection request is corresponding;
Information memory cell 20, for receiving the response message that described PDN Gateway returns for described request message, preserving the PDN carried in described response message and connecting corresponding GREKEY information.
Preferably,
Described information request unit is agent binding update PBU message to the request message that PDN Gateway sends, the identification information that this PDN of pre-registration indication information and unique identification is connected is carried in described PBU message, it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message, described pre-registration indication information is a self-defined mobile option of manufacturer of definition separately in PBU message, or the value that the switching indication field existed in PBU message newly increases.
Preferably,
Described information request unit sends a request message to described PDN Gateway, is the GREKEY information that this PDN connection request is corresponding, comprises:
Described information request unit is being that this PDN is connected in the Network Control Protocol VSNCP negotiations process that the equipment vendor that carries out defines with described UE, receive the VSNCP configuring request that described UE sends, carry the information that unique identification PDN connects in described VSNCP configuring request, the identification information that this PDN of described unique identification connects comprises: the identification information that the identification information of described UE, described APN are connected with this PDN; And described information request unit sends PBU message to described PDN Gateway, carries the information that pre-registration indication information is connected with described unique identification PDN.
Preferably,
Described HSGW also comprises: the actual hand-off process module that LTE network switches to the optimization of eHRPD network, and described actual hand-off process module comprises:
Upstream data retransmission unit, for in the actual handover process that UE described after pre-registration procedure initiates, if receive the upstream data of the PDN connection that described UE sends, then connect corresponding GREKEY information according to the described PDN preserved, described upstream data to be encapsulated in gre tunneling and to be sent to corresponding PDN Gateway.
Correspondingly, the present embodiment additionally provides a kind of grouped data network gateway, and comprise the pre-registration processing module that long evolving system LTE network switches to the optimization of evolved high speed grouped data eHRPD network, as shown in Figure 10, described pre-registration processing module comprises:
Message reception units 50, for receiving the request message that evolved high speed packet data gateway HSGW sends, described request message is for being generic route encapsulation key GREKEY information corresponding to a PDN connection request;
Message response unit 60, after receiving described request message, returns response message to described HSGW, carries this PDN and connect corresponding GREKEY information in described response message.
Preferably,
The described request message that described message reception units receives is for being agent binding update PBU message, described PBU message carries the identification information that this PDN of pre-registration indication information and unique identification is connected, and it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message;
Described message response unit is that agent binding confirms PBA message to the response message that described HSGW returns, and the identification information carrying this PDN of unique identification connection in described PBA message is connected corresponding GREKEY information with this PDN.
Correspondingly, the present embodiment additionally provides the system that a kind of optimization supporting multi-packet data network PDN to connect switches, comprise evolved high speed grouped data eHRPD network and long evolving system LTE network, wherein, the above-mentioned HSGW that the evolved high speed packet data gateway HSGW in described eHRPD network adopts the present embodiment to provide; The above-mentioned PDN Gateway that packet data network PDN Gateway in described LTE network adopts the present embodiment to provide.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, and in some cases, step shown or described by can performing with the order be different from herein, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (18)
1. the method that the optimization supporting multi-packet data network PDN to connect switches, be applied to evolved high speed packet data gateway HSGW, described method comprises:
In the pre-registration procedure that long evolving system LTE network switches to the optimization of evolved high speed grouped data eHRPD network, HSGW connects user equipment (UE) each PDN that same APN APN sets up, sending a request message to PDN Gateway, is the generic route encapsulation key GREKEY information that this PDN connection request is corresponding;
Described HSGW receives the response message that described PDN Gateway returns for described request message, preserves the PDN carried in described response message and connects corresponding GREKEY information.
2. the method for claim 1, is characterized in that:
Described request message is agent binding update PBU message, described PBU message carries the identification information that this PDN of pre-registration indication information and unique identification is connected, and it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message.
3. method as claimed in claim 2, is characterized in that:
Described pre-registration indication information is a self-defined mobile option of manufacturer of definition separately in PBU message; Or, be the value that the switching indication field existed in PBU message newly increases.
4. method as claimed in claim 2 or claim 3, is characterized in that:
Described HSGW sends a request message to described PDN Gateway, is the GREKEY information that this PDN connection request is corresponding, comprises:
Described HSGW and described UE be this PDN be connected carry out equipment vendor definition Network Control Protocol VSNCP negotiations process in, described HSGW receives the VSNCP configuring request that described UE sends, carry the identification information that this PDN of unique identification connects in described VSNCP configuring request, the identification information that this PDN of described unique identification connects comprises: the identification information that the identification information of described UE, described APN are connected with this PDN;
Described HSGW sends PBU message to described PDN Gateway, carries the identification information that pre-registration indication information is connected with this PDN of described unique identification.
5. the method as described in claim 1 or 2 or 3, is characterized in that, also comprise:
In the actual handover process that described UE initiates after described pre-registration procedure, if described HSGW receives the upstream data of the PDN connection that described UE sends, then connect corresponding GREKEY information according to the described PDN preserved, described upstream data to be encapsulated in gre tunneling and to be sent to corresponding PDN Gateway.
6. the method that the optimization supporting multi-packet data network PDN to connect switches, be applied to packet data network PDN Gateway, described method comprises:
In the pre-registration procedure that long evolving system LTE network switches to the optimization of evolved high speed grouped data eHRPD network, PDN Gateway receives the request message that evolved high speed packet data gateway HSGW sends, and described request message is for being generic route encapsulation key GREKEY information corresponding to a PDN connection request;
Described PDN Gateway returns response message to described HSGW, carries this PDN and connect corresponding GREKEY information in described response message.
7. method as claimed in claim 6, is characterized in that:
Described request message is agent binding update PBU message, described PBU message carries the identification information that this PDN of pre-registration indication information and unique identification is connected, and it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message;
Described response message is that agent binding confirms PBA message, and the identification information carrying this PDN of unique identification connection in described PBA message is connected corresponding GREKEY information with this PDN.
8. an evolved high speed packet data gateway HSGW, comprise the pre-registration processing module that long evolving system LTE network switches to the optimization of evolved high speed grouped data eHRPD network, it is characterized in that, described pre-registration processing module comprises:
Information request unit, for connecting user equipment (UE) each PDN that same APN APN sets up, sends a request message to grouped data network gateway PDN Gateway, is the generic route encapsulation key GREKEY information that this PDN connection request is corresponding;
Information memory cell, for receiving the response message that described PDN Gateway returns for described request message, preserving the PDN carried in described response message and connecting corresponding GREKEY information.
9. HSGW as claimed in claim 8, is characterized in that:
Described information request unit is agent binding update PBU message to the request message that PDN Gateway sends, the identification information that this PDN of pre-registration indication information and unique identification is connected is carried in described PBU message, it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message, described pre-registration indication information is a self-defined mobile option of manufacturer of definition separately in PBU message, or the value that the switching indication field existed in PBU message newly increases.
10. HSGW as claimed in claim 8 or 9, is characterized in that:
Also comprise: the actual hand-off process module that LTE network switches to the optimization of eHRPD network, described actual hand-off process module comprises:
Upstream data retransmission unit, for in the actual handover process that UE described after pre-registration procedure initiates, if receive the upstream data of the PDN connection that described UE sends, then connect corresponding GREKEY information according to the described PDN preserved, described upstream data to be encapsulated in gre tunneling and to be sent to corresponding PDN Gateway.
11. 1 kinds of packet data network PDN Gateway, is characterized in that, comprise the pre-registration processing module that long evolving system LTE network switches to the optimization of evolved high speed grouped data eHRPD network, described pre-registration processing module comprises:
Message reception units, for receiving the request message that evolved high speed packet data gateway HSGW sends, described request message is for being generic route encapsulation key GREKEY information corresponding to a PDN connection request;
Message response unit, after receiving described request message, returns response message to described HSGW, carries this PDN and connect corresponding GREKEY information in described response message.
12. PDN Gateway as claimed in claim 11, is characterized in that:
The described request message that described message reception units receives is for being agent binding update PBU message, described PBU message carries the identification information that this PDN of pre-registration indication information and unique identification is connected, and it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message;
Described message response unit is that agent binding confirms PBA message to the response message that described HSGW returns, and the identification information carrying this PDN of unique identification connection in described PBA message is connected corresponding GREKEY information with this PDN.
The method that 13. 1 kinds of optimization supporting multi-packet data network PDN to connect switches, be applied to the pre-registration procedure that long evolving system LTE network switches to the optimization of evolved high speed grouped data eHRPD network, described method comprises:
User equipment (UE) each PDN that same APN APN sets up is connected, performs following process:
Evolved high speed packet data gateway HSGW sends a request message to PDN Gateway, is the generic route encapsulation key GREKEY information that this PDN connection request is corresponding;
After described PDN Gateway receives described request message, in the response message returning to described HSGW, carry this PDN connect corresponding GREKEY information;
After described HSGW receives described response message, preserve this PDN and connect corresponding GREKEY information.
14. methods as claimed in claim 13, is characterized in that:
Described request message is agent binding update PBU message, described PBU message carries the identification information that this PDN of pre-registration indication information and unique identification is connected, and it is send in the pre-registration procedure optimizing switching that described pre-registration indication information is used to indicate PBU message;
Described response message is that agent binding confirms PBA message, carries the identification information of this PDN of unique identification connection and described GREKEY information in described PBA message.
15. methods as claimed in claim 14, is characterized in that:
Described pre-registration indication information is a self-defined mobile option of manufacturer of definition separately in PBU message; Or
Described pre-registration indication information is the value that the switching indication field existed in PBU message newly increases.
16. methods as described in claims 14 or 15, is characterized in that:
Described HSGW sends a request message to described PDN Gateway, is the GREKEY information that this PDN connection request is corresponding, comprises:
Described HSGW and described UE be this PDN be connected carry out equipment vendor definition Network Control Protocol VSNCP negotiations process in, described HSGW receives the VSNCP configuring request that described UE sends, the identification information that this PDN of unique identification connects is carried, comprising the identification information that the identification information of described UE, the information of described APN are connected with this PDN in described VSNCP configuring request;
Described HSGW sends PBU message to described PDN Gateway, carries the identification information that this PDN of pre-registration indication information and unique identification is connected.
17. methods as described in any one of claim 13 to 15, is characterized in that, also comprise:
In the actual handover process that described UE initiates after described pre-registration procedure, if described HSGW receives the upstream data of the PDN connection that described UE sends, described HSGW connects corresponding GREKEY information according to the described PDN preserved, and to be encapsulated into by described upstream data in gre tunneling and to be sent to corresponding PDN Gateway.
The system that 18. 1 kinds of optimization supporting multi-packet data network PDN to connect switches, comprises evolved high speed grouped data eHRPD network and long evolving system LTE network, it is characterized in that:
Evolved high speed packet data gateway HSGW in described eHRPD network adopts the HSGW as described in claim 8 or 9 or 10;
Packet data network PDN Gateway in described LTE network adopts as the PDN Gateway in claim 11 or 12.
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